[latexrefman] inputenc and NBSP

[Karl Berry]

    I think that [typing NBSP] is still worth mentionning. 

Seems fine to me to mention the possibility of using NBSP input
characters as equivalent to "~". I think it's better not to go into the
pros and cons, which will differ for different people, according to many
factors. (For me personally, NBSP would be completely horrible, while ~
is just fine.) -k